(economics) The condition that constrains expenditure to income (for a person) or the value of exports to imports (for a state)

Solving problems within given limits.

a paradigm for solving combinatorial problems that draws on a wide range of techniques from artificial intelligence, computer science, and operations research.

Rules ensuring database accuracy, consistency.

In economics, a liquidity constraint is a form of imperfection in the capital market which imposes a limit on the amount an individual can borrow, or an alteration in the interest rate they pay.